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AF
Air France
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Delta Air Lines
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KLM
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Economy
IAD
Washington Dulles International Airport
Washington, United States
BIO
Bilbao Airport
Bilbao, Spain
$507 USD
-25%
$378
USD
Verified Nov 29, 2025 at 5:33 AM
January 2026
Today
Mon
Tue
Wed
Thu
Fri
Sat
Sun
29
30
31
1
$468
2
$579
3
$738
4
$538
5
$529
6
$479
7
$418
8
$543
9
$545
10
$488
11
$443
12
$993
13
$378
14
$388
15
$428
16
$428
17
$430
18
$378
19
$378
20
$378
21
$378
22
$428
23
$428
24
$428
25
$378
26
$378
27
$378
28
$378
29
$428
30
$428
31
$428
1
$378
Fair Availability
26% of dates checked are available within 10% of the lowest price
Friday, January 2nd, 2026
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